AutoCodes – Scion – P0121 2006 Scion xB

P0121 2006 Scion xB Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance

Quick Answer

The throttle position sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0121 2006 Scion xB indicates Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance.
Common causes: Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,482

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0121 2006 Scion xB Description

The throttle position sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0121 2006 Scion xB - Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance - AutoCodes.com — P0121 2006 Scion xB Code - Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0121 2006 Scion xB?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0121 2006 Scion xB?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0121 2006 Scion xB code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0121 2006 Scion xB code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0121 2006 Scion xB Code

1. What does OBDII code P0121 on a 2006 Scion xB indicate?

- This code indicates an issue with the Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance.

2. What are the common symptoms of OBDII code P0121 on a 2006 Scion xB?

- Common symptoms include reduced engine power, hesitation during acceleration, and the vehicle going into limp mode.

3. What are the possible causes of OBDII code P0121 on a 2006 Scion xB?

- Possible causes include a faulty throttle position sensor, damaged wiring or connectors, a problem with the throttle body, or issues with the engine control module.

4. How can I diagnose the cause of OBDII code P0121 on a 2006 Scion xB?

- Diagnose the code by checking the throttle position sensor's voltage using a multimeter, inspecting the wiring for any damage, and ensuring proper connection to the throttle body.

5. Can I continue driving my 2006 Scion xB with OBDII code P0121?

- It is not recommended to drive the vehicle with this code as it can lead to further damage and potentially unsafe driving conditions.

6. How do I repair OBDII code P0121 on a 2006 Scion xB?

- Repair options include replacing the throttle position sensor, repairing or replacing damaged wiring, cleaning the throttle body, or reprogramming the engine control module.

7. Will resetting the check engine light resolve OBDII code P0121 on a 2006 Scion xB?

- Resetting the check engine light may temporarily clear the code, but it will likely return if the underlying issue is not addressed.

8. Are there any DIY tips for addressing OBDII code P0121 on a 2006 Scion xB?

- DIY tips include checking for loose or damaged wiring, cleaning the throttle body, and ensuring proper sensor connections before seeking professional help.

9. How much does it typically cost to repair OBDII code P0121 on a 2006 Scion xB?

- The cost of repair can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor.

10. Can a mechanic easily fix OBDII code P0121 on a 2006 Scion xB?

- A qualified mechanic should be able to diagnose and repair the issue efficiently, ensuring proper functioning of the throttle position sensor and related components.